2021 MLB draft prospect rankings: Vanderbilt's Jack Leiter, Kumar Rocker top Keith Law's list - The Athletic
2021 MLB Mock Draft: Louisville catcher to Pirates at No. 1; Vandy's Jack Leiter, Kumar Rocker not far behind
Kumar Rocker — MLB Draft — Prospects Live
MLB draft: Seven players the Red Sox could pick at No. 4 - The Boston Globe
Brendan Tuma's 2021 MLB Draft Top 10 Prospects (Fantasy Baseball)
2021 MLB Draft Top 50 Prospects: 1-10 - Minor Leagues - Twins Daily
Will Jack Leiter Fall To Red Sox, And Why Did He Slip In MLB Mock Draft?
2021 MLB Draft: Mock Draft 3.0 - Baseball Prospect Journal
Mayer, Leiter, Rocker among top prospects for MLB draft – Saratogian
Jack Leiter to Red Sox? Vanderbilt righty wants to land in Boston, per Fangraphs' mock draft: 'A match made in heaven' (report)
MLB Draft: All you need to know about Kumar Rocker, Jack Leiter and Henry Davis
Winners, losers, takeaways from Day 1 of 2021 MLB Draft
2023 MLB Draft: The Top 500 Prospects - Future Stars Series
Texas Rangers 2021 draft preview: Kumar Rocker - Lone Star Ball
2021 Arizona Diamondbacks Draft Preview: Surveying the Board and Process - AZ Snake Pit